C# WPF adding scrollviewer to grid breaking rows heights

Question

When I add a ScrollViewer to the Grid, the height of the rows is broken as seen in the images. How can I fix it?

With ScrollViewer (bad):

Without ScrollViewer (good):

When I add height to the grid, it is fixed, but I do not want this. I want the grid to automatically grow and shrink when the window is resized.

<ScrollViewer Grid.Column="1">
    <Grid Grid.Row="0" Grid.Column="1"  >
         <Grid.RowDefinitions>
             <RowDefinition Height="1.5*"></RowDefinition>
             <RowDefinition Height="*"></RowDefinition>
         </Grid.RowDefinitions>

         <Grid.ColumnDefinitions>
             <ColumnDefinition Width="*"></ColumnDefinition>
         </Grid.ColumnDefinitions>

         <Grid x:Name="MainMovieTvShow" Background="#000000" Grid.Row="0" Grid.Column="0">
             <Grid.ColumnDefinitions>
                 <ColumnDefinition Width="0.1*"></ColumnDefinition>
                 <ColumnDefinition Width="*"></ColumnDefinition>
                 <ColumnDefinition Width="*"></ColumnDefinition>
             </Grid.ColumnDefinitions>

             <Grid.RowDefinitions>
                 <RowDefinition Height="2*"></RowDefinition>
                 <RowDefinition Height="*"></RowDefinition>
                 <RowDefinition Height="0.3*"></RowDefinition>
                 <RowDefinition Height="0.1*"></RowDefinition>
                 <RowDefinition Height="*"></RowDefinition>
                 <RowDefinition Height="0.1*"></RowDefinition>
                 <RowDefinition Height="0.5*"></RowDefinition>
                 <RowDefinition Height="*"></RowDefinition>
             </Grid.RowDefinitions>

         </Grid>

         <Grid Grid.Row="1" Grid.Column="0">
             <Grid.RowDefinitions>
                 <RowDefinition Height="0.1*"></RowDefinition>
                 <RowDefinition Height="0.2*"></RowDefinition>
                 <RowDefinition Height="0.1*"></RowDefinition>
                 <RowDefinition Height="2*"></RowDefinition>
                 <RowDefinition Height="0.1*"></RowDefinition>
             </Grid.RowDefinitions>
             <Grid.ColumnDefinitions>
                 <ColumnDefinition Width="0.1*"></ColumnDefinition>
                 <ColumnDefinition Width="*"></ColumnDefinition>
                 <ColumnDefinition Width="*"></ColumnDefinition>
             </Grid.ColumnDefinitions>
         </Grid>
     </Grid>
 </ScrollViewer>